Door lock



Jan. 15, 1952 E. D. DALI. 2,582,924

DOOR Loox Filed Sept. 27, 1946 3 Sheets-Sheet l 'lIlIIlIlII/llllll rINVENTOR.

@WARD 10.; QAM.

AT TYS.

Jan. 15, 1952 Filed Sept. 27, 1946 E. D. DALL. 2,582,924

DOOR LOCK 3 Sheets-Sheet 2 m lf INVENTOR.

BY EOM/ARD LL A YS.

Jan. 15, 1952 E. D. DALL 2,582,924

DOOR LOCK Filed Sept. 27, 1946 3 Sheets-Sheet 3 .IN VEN TOR.

By fowmb '0A/.1.

ATTYS.

Patented Jan. 15, 1952 DOOR LOCK Edward D. Dall, Detroit, Mich.,assigner to` Houdaille-Hershey Corporation, Detroit, Mich., acorporation of Michigan Application September 27, 1946, Serial No.699,717

Claims. (Cl. 292--216) This invention relates to a door lock, and moreparticularly to a door lock structure for use on automobile door-s. Itis desirable that the door of an automobile Should be designed so thatit can be locked from the outside without using a door key. This methodof locking the door from the outside is very convenient and savesconsiderable time. However, it is necessary that provision be made inany device that employs this method of locking so that the door does notlock every time it is closed but only when a conscious, deliberateeffort is made to lock it.

In accordance with the general features of my invention I have provideda lock for an automobile door that may belocked from the outside withoutusing a key simply by pressing down the push button on the insidemolding of the door and then holding the outside door handle in a turneddown position as the door is swung to its closed position. Further, ifthe outsidedoor handle is not held in a turned down position as the dooris closed, the mechanism will be returned to an unlocked position. Thus,the door may be locked from the outside only by a deliberate act of aperson closing the door.

vIn addition, this lock is fitted with a key mechanism for unlocking thedoor from the outside. There is also providedrmeans for locking andunlocking the door from the inside.

It is therefore an important object of the present invention to providea lock which, when mounted on an automobile door, will permit the doorto be locked from the outside without using a door key.

' It is another object of this invention to provide locking means bywhich the automobile door may be locked from the outside without the useoi a key only when the person closing the door wishes to lock it.

Other and -further important objects of this invention will be apparentfrom the disclosures in the speciiication and the accompanying drawings.

On the drawings:

For a better understanding of the drawings, which will be presentlydescribed, it may be pointed` out that the. locking Vstructure isassembled on a base plate formed to provide two plate portionsapproximately at right angles to each other. The plate portion which isto be mounted on the opening edge' of the door and which carries therotor assembly for contacting the striker plate on theV `door post willherein.- after be called the rotor plate. The other plate portion, whichlits into position parallel :to the inside wall of the door and on whichis mounted the roll-back means, will hereinafter be called the roll-backplate.

Figure l is a side elevational view of a locking structure embodying theprinciples of my invention, showing the locking mechanism mounted on theroll-back plate with the lock in its latched but unlocked position andalso showing, with parts broken away, the door operating mechanismsactuated, respectively, by the inside door handle and by a buttonoperated lever, the locking structure illustrated in Fig. 1 beingadapted for use on a front door of an automobile.

Figure 2 is a side elevational view of the locking mechanism mounted onthe inside of the rotor plate, showing the rotor lever out of engagementwith the cam surface, as is the case when the door is open.

Figure 3 is a fragmentary, sectional view taken substantially along theline III-III of Fig. 1, in association with van elevational view of thestriker plate, or keeper structure, mounted upon the door post,illustrating the position of the rotor and safety catch arm as the doorapproaches a closed position.

Figure 4 is a fragmentary, sectional View with the keeper in elevation,similar to Fig. 3 but showing the relative positioning of the parts inthe safety-latch position.

Figure 5 is a fragmentary, sectional view with the keeper structure inelevation, similar to Figs. 3 and 4 but with the part-s in theirrelative positions after the door has been fully latched.

Figure 6 is a side elevational view, partly broken away, of the lockingmechanism mounted on the roll-back plate showing the lock in itsunlatched, unlocked position.

Figure 7 is a side elevational View of the locking mechanism mounted onthe inside of the rotor plate,l showing the rotor lever in full take-upposition on the cam surface, as is the case when the door is closed.

Figure 8 is a fragmentary enlarged sectional view taken substantiallyalong the line VIII- VIII of Fig. 1.

Figure 9 is a side elevational View, partly broken away, of the lockingmechanism mounted on the roll-back plate, showing the lock in itslatched and locked position.

Figure 10 is a side elevational view, partly broken away, of the lockingmechanism .mounted on the roll-backplate, showing the lock in its backlever in a turned down position, as is the case when the door is beingswung and closed for locking thereof without the use of a key.

Figure 11 is a fragmentary sectional View taken on the line XI-XI ofFig. 1.

The locking mechanism of my invention illustrated in Figs. 1 to 11,inclusive, is one adapted to be used on either of the front or reardoors of an automobile. As previously stated, the main locking structureis assembled on a base plate formed to provide two plate portionsdisposed at approximately right angles to each other. Although theseplate portions are ordinarily formed from a single ibase plate bybending the plate, they will be herein referred to as though they wereseparate plates, one being identied as the rotor plate and the other asthe roll-back plate.

In Figs. 1, 6, 9, and 10 the roll-back plate is identified by thereference numeral I0 and comprises a rectangular plate that may besuitably formed of light gauge metal sheet. A roll-back lever II ismounted for pivotal movement upon the plate I0, being positioned thereonby the square spindle I2 of the outside door handle 9. A second lever I3is also mounted upon the spindle I2 and lies on top of the lever II,both of said levers having square apertures for receiving said spindleI2 for turning movement therewith. A spring I4 normally urges the leverI3 against a stop I5. The spring I4 is anchored at one end in a metalloop I8 (Figs. 1 and 8) secured to the roll-back plate I0. The spring I4has a coiled intermediate portion I4a enclosing the loop I8 and isprovided with a straight end portion I4b that extends into and isconfined by said loop I8. The free end of the spring I4 is bowed, as atI4c, for engagement with a lower edge of the top lever I3.

A latch control lever I6 is mounted upon the roll-back plate I0 forpivotal movement about the loop I8. For this purpose, an annular washerI 6a (Fig. 8) is positioned upon said loop I8 be` tween the plate I0 andthe spring I4, and the lever I6 pivots about said washer I6a. The leverI6 is provided with a projection I'I extending from its upper edge andadapted to cooperate with the roll-back lever II in the operation of thelocking mechanism. It should be noted in this connection that theroll-back lever II may be rotated in a clockwise direction by means ofthe spindle I2 into contact with the projection I1 of the lever I6 (Fig.6), while counterclockwise rotation o f said roll-back lever II, as wellas of the overlying lever I3, is limited by the stop I5, against whichthe levers II and I3 are normally held under the action of the springI4.

As a means of operating the lock mechanism from the inside of theautomobile there is provided a pin I9 secured in the lever I6 near thelower portion thereof and projecting inwardly (as viewed from the insideof the car) into a slot 20a provided in a strap l2l). Said strap 20 isconnected to the inside handle mechanism, indicated generally by thereference numeral I80 and to be described later on. Said lever I6 isalso provided at its lower end with an inwardly bent up flange, or edge,2I. An arcuate shaped slot 22 is provided in the upper right hand cornerof the lever I6 as viewed in Figs. 1, 6, 9 and 10, which serves as aguide for the travel of a pin 23 projecting inwardly from a rod 65. Saidrod 65 extends upwardly through the molding of the door and carries atits upper end a push button (not shown) to facilitate manualmanipulation of the rod in thelocking or unlocking operation, details ofwhich will be apparent as the description proceeds. When the lever I6 isrotated in a counterclockwise direction, either by means of the rollbacklever II or by means of the strap 29 acting through the pin I9, thelocking mechanism is brought into its unlatched, unlocked position asillustrated in Fig. 6.

A clogging lever 24, which is the lever by which the mechanism islatched, is mounted upon said roll-back plate I0. Said dogging lever 24has an upwardly projecting tongue 24a for cooperation with thedownwardly projecting tongue 26 formed on the lever IS. Said dogginglever 24 also has a latching arm 26 which extends through the rotorplate IIlI and acts as a safety catch arm, as well as acting as a meansfor rotating the dogging lever 24. A spring 21, anchored at '28 on theroll-back plate I0, has a free end 21a biased against the underside 24bof the dogging lever 24 to resist any clockwise rotation of said dogginglever 24.

A locking lever 29, which is effective to prevent operation of thelocking mechanism from the outside, is provided with a square aperturefor receiving a square spindle 30, which constitutes the shank of theoutside key operated lock. As best seen in Fig. 1l, the square shank 39of the key operated lock ts into a square aperture in the locking lever29, causing rotation of the locking lever with the shank 38. The lockinglever 29 is pivotally positioned in a cylindrical recess 29a formed inthe clogging lever 24. The square shank 30 of the key operated lock alsoextends through the clogging plate 24 but does not contact the sidesthereof, permitting the locking lever 29 to be rotated independently ofthe flogging lever 24. The dogging lever 24 is pivotally positioned in acylindrical opening IIJa in the roll-back plate I 0.

The locking lever 29 has two arms 3| and 32 which provide therebetween apocket 33 for engagement with the bent-up flange 2I of the lever I6, foroperating the lever I6 to locking position, as illustrated in Fig. 9.When the projection 2| is so engaged between the two arms 3I and 32, thelever I6 may be rotated in a clockwise direction by means of the arm 32,or it may be rotated in a counterclockwise direction by the action ofthe arm 3I.

In order to hold the locking lever 29 in the position selected by theoutside key operated lock, there is provided a spring 34, anchored atone end, as at 34a, between the roll-back plate ID and a cover plate 35,bearing at its free end 34h against the lower edge of the locking lever29. Said locking lever 29 is provided with a pair of spaced notches 36and 3'I, into which the free end of the spring 34 is adapted to beselectively moved during rotation of the spindle 3D by means of theoutside key lock. Both the dogging lever 24 and the locking lever 29 areheld down in place against the roll-back plate I0 by means of the coverplate 35.

Referring to Figs. 1 to 5, a rectangular housing 38 is mounted on theoutside of the rotor plate IUI. Mounted in said housing 38 is a rotorlatch bolt 39 which rotates upon a pin 40, the ends of which areanchored, respectively, to the outer wall of the housing and in therotor plate I 0I. Said rotor 39 has a locking or latching arm 4I and asetting arm 42. A stud 43 (Fig. 2) projects from the side of the arm 4Ithrough an arcuate slot 44 in the rotor plate IUI.

Immediately adjacent the inside wall of the rotor plate I 0I, a rotorlocking lever 45 is ful,-

message maimed on thestud 43 (Fig. .2). A coiledspring 46 4surrounds andis anchored at one end, as at 46a, to the stud 43, with its free -end461) held against an inwardly projecting arm 41 of the rotor lockinglever '45. The action of said spring 46 tends to revolve said lockinglever 45 in la counterclockwise direction-about the stud 43. The innerend of the rotor fulcrum pin 4i) acts as a stop tending to limit therotating effect `of the spring 46, and, when the stud 43 is at the'lowerend of `the slot 44, as shown in Fig. 2, the rotor locking lever 45 isin contact with the pin4-B and the spring 46 is prevented from rotatingthe rotor lever further in a counterclockW-ise direction about the `stud43..

A stud 48-extends inwardly from the rotor plate IUI adjacent the outeredge thereof to form a fulcrum supp-ort for :the outer end of a holdingand take-up lever 49. The upper edge of said lever 49 .is serrated orprovided with a wave-like contour, as at 49a. VThe rotor locking lever45 is provided at its upper end with an inwardly projecting "tongue 55having a curved edge 55a adapted toengage the upper edge 49a of thetakeup lever 49. Said lever 49 has an arm 5I that is downwardly offsetat the upper edge 49a and that extends through a slot 51a in theroll-back plate i. When the Vclogging lever 24 is in its doggingposition, the end of the varm l rests thereon, 'as illustrated in Figs.1 and 9, to prevent downward movement of said arm 5i whereas, when thedogging lever 24 is out of its dogging position, as illustrated in Fig.(i, the arm 5I is -free to drop and thereby eiiect a disengagementbetween the tongue 50 and the upper edge 49a. of the take-up lever 49.Thereupon `the rotor locking lever 4-5 is free to move out of engagementwith said take-up lever 4Q. The wavelike contour or teeth as at 49a ofthe lever 49 can be omitted entirely. `In this case, the edge of thelever would be smooth and the tongue El! of the locking lever `45 vwouldbe frictionally held in any position along this lever 49 that ithappened to stop, as determined by the tightness of the door.

The operation of the locking mechanism will now be described.

.Latching of thedoor is accomplished in the followingmanner. Let usassume that the door is open. The relative position of the elements ofthe lockingV mechanim will then be as illustrated in Fig. 1. The dogginglever 24 assumes the position there shown due to the counterclockwiseforce imposed upon it by the spring 21. -On closing the door, the arm`2li of the dogging lever 24 is brought into contact with the keeperYstructure `mounted on -the door post.

.As illustrated in Figs. 3` to 5 inclusive, the keeper structure K is ofU shape and provides a channel 52, the middle portion of the upperWall-'of which is deected downwardly to provide a V-shaped cammingprojection 53 in the channel. The lower wall of the channel is deflectedupwardly tol provide a camming projection 54 having a gradually inclinedguide surface 55 along its outer end and provided with a shoulder 5.6along its inner end in advance of a recess When the door is swung fromopen position for closing thereof, the .projecting safety-catch arm 26Vof the dogging .lever 24 will encounter the inclined surface 55,thereby causing the dogging lever 24 to be Vrocked in a clockwisedirection against thej resistance of the spring 2l. As closing of thedoor (continues, Vthe-arm 26 rides up along thegu'ide `surface 55 landalong the intermediatehorizontal portion of the camming :surface-54until it reaches the shoulder 5S, whereupon Athe safety catch arm 26 isfree to drop and under the positive action of the spring .2 is

Y vcaused to fdrop Vdowninto the vrecess 5i (Fig. 4),

The door is now in its safety latchcd .position with the relativeposition of 'the elements of the locking mechanism being as shown inFig. 1. From the instant that the safety catch Vyarn-l 25 drops kdown inback of the shoulder 56, the door will be `safety latched and cannot beopened from this position `until the safety catch arm -26 is swung outof the recess l51 by means of the release action of either the insidedoor handle or the outside handle.

After the -safety catch arm has dropped int ithe recess 51 and themovement of the door .is continued toward full Alatched position, thesetlting arm-42 of the lrotor -39 comes into engagement with theinclined outer face of the projection 53 :in the keeper channel, asshown'in Fig. 4. Further iclosing movement yof the door causes the rotor39 to Aloe rocked `upon its fulcrum pin 40, thereby rotatingthe lockingarm 4l in a counterclockwise direction.

Due to the fact that the spring 4'5 tendsy to rotate the lever 45 in acounterclockwise directi'on fand thereby lto keep the lower vedge 45aagainst the stud 4B, said rotor locking lever 45 will revolve as a unitina counterclockwise direction about the `stud when the rotor arm 4| isso revolved. However, when the tongue 55 of the rotor locking Alevercontacts the side of the take-up lever :419,2at 49h (Fig. 2) ,it wil1 beforced upwardly in substantially a vertical direction vupon continuedrotation of the rotor arm 4l. Thus, the lower edge 45a of the rotorlocking lever 45 is pulled .away Vfrom the stud 4D against the action of`the `spring 45. When, in its upward movement, the curved surface areaches the .top of the cam surface 49a, the action of 'the 'spring 4Bwillmove the tongue `5G to the left along said `'cam surface 49a. Thecam surface 48a is designed with an arced surface such that the more thetongue 50 moves to the left along the cam surface, the closer the springV45 will come 4to .restoring the lower edge 45a `of the rotor lockinglever 45. :on the stud 40. However, in the total travel across said camsurface, the vedge v45a wil1 :not quite come to vrest on `the stud 45`and therefore there is, for any position of the tongue 50 on the camsurface, a force due to vthe spring 45 tending to press .said tongue 5Bagainst the cam vsurface 49a.

At `the `same time as-the tongue 50 is starting to move to the leftacross the :cam surface 45d. the end of the rotor locking arm 4l moves:into engagement Awith the rear inclined surface 3l? of the projection253 .on the'keeper K until itreac-hes the position illustrated in Fig.5. In this position lthe door is latched and cannot be opened V'untilthe .rotor 39-is free tov revolve about its fulcrum pin '40 in aclockwise direction. `In the latched position, ythe rotor 39 cannotrevolve in a clock:- wise direction because the tongue 55, which vis Janintegral part of the rotor .lock-ing 'lever 45, .isV now locked on the:cam surface 45a of the take-up `lever 49.. Said take-up lever, in turn,rcannot move in `a. clockwise direction, or downwardly, because itsprojecting arm 5| is. prevented 'from moving` in a vertical direction bythe dogging lever .24, theA under `surface of the varm 5l then restingupon the upper edge 24e of said clogging lever as shown in Fig; 1.

- 'It is to be noted that when the door is closed the rotor 39 is in theposition indicated in Fig. 5. Upon the door being opened, the camsurface 69 which is part of the door post structure will act on therotor 39 to rotate it about its stud 40 in a clockwise direction.However, when the lock of this invention is in the latched position asillustrated in Fig. 1 and the take-up lever 5D is positioned on the camsurface 49a as indicated in Fig. 7, the total effect of the action ofthe inclined surface 60 of the keeper against the locking arm 4I is topress the lever 50 more firmly down upon the camming surface 49a of thetake-up lever 49 whenever a force is exerted against the door tending toopen it, provided there is no concurrent use of the door handle releasemeans. Such a force, for instance, would be exerted against the door ifa person or object were accidentally to `lean or to fall against theinside of the door.

At any position that the tongue 50 may assume along the camming surface49a of the take-up lever 49, it will be held tightly in place by theaction 'of the inclined surface 60 of the keeper against the locking arm4|. Thus, while the tongue 56 will move across the camming surface 49aonly tongue 50, so that no amount of vibration by itself loosens theengagement of the tongue 59 with the cam surface 49a although suchvibration may produce a tightening eect due to the continuous biasingaction of the spring 46 tending to move the tongue 50 into tighter andtighter engagement with the camming surface 49a.

The pressure which the tongue 50 of lever 45 exerts on the cammingsurface 49a of the lever 49 acts through a moment arm about the centerof the stud 48 and thus causes the arm .5I of the lever 49 to exert apressure on the dogging lever 24. The tighter the door is closed, theshorter will be the moment arm since the tongue 5D will move further upalong the camming surface 49a.

However, at the same time that the moment arm is being shortened, thepressure of the tongue 55 on the camming surface 49a is being increaseddue to the tighter closing of the door, and as a result the pressure ofthe arm 5I of the lever 49 on the dogging lever 24 will remainsubstantially constant. Therefore the pressure required for releasingthe dogging lever 24 from under the arm 5I will remain nearly constant.

From the preceding discussion it is evident that the method used in thisinvention to lock the mechanism is by preventing the unlatching of themechanism. If the clogging lever 24 cannot be withdrawn from underneaththe arm 5|, the door cannot be opened. It is therefore necessary thatthe two methods of removing the clogging lever from under the arm 5| andthus unlatching the door be understood.

From the outside, the door may be unlatched by rotating the roll-backlever II in a clockwise direction by use of the outside door handle. Theroll-back lever II Will contact the projection il on the lever I6 tocause said lever I6 `to be rotated in a counterclcckwise direction intoa posiytion such as illustrated in Fig. 6. The lever I6 will, in turn,effect contact between the projection 25 on said lever and theprojection 24a on the clogging lever 24, causing the clogging lever 24to rotate in a clockwise direction out from under the arm 5|, at thesame time raising the safety arm 26 to a point above the level oftheshoulder 56 of the keeper. When the locking mechanism is in thisposition, Fig. 6, the door can be opened by an outward pull on thehandle, outward movement of the door causing the surface 66 of thekeeper K to rotate the locking arm 4I in a clockwise direction to permitthe door to open.

The second method of unlatching the door is by means of the inside doorhandle. As illustrated in Fig. l, the inside door handle mechanism |00includes an inside door handle 62 extending from a shaft 63. Adownwardly extending lever arm |02 is mounted upon said shaft 63 and atits lower end is pivotally connected, as at |93, to the free end of thestrap 20. A spring |04 tends to maintain the shaft 63 of the inside doorhandle 62 in the position indicated in Fig. 1.

It will be evident that when the inside door handle 62 is rotated in acounterclockwise direction about its fulcrum 63, the strap 20 will bemoved to the right, as viewed in Fig. 1. When said strap 26 has beenmoved far enough to the right to bring the left hand end of the slot 20ainto contact with the pin I9, further movement of the strap 29 willcause the pin I9 to be moved to the right. Since the pin I9 is anintegral part of the lever I6, said lever will be rotated in acounterclockwise direction about its pivot pin I8. In the course of itscounterclockwise rotation, the projection 25 on the lever I6 will comeinto contact with the projection 24a on the dogging lever 24, causingthe latter to be rotated in a clockwise direction and withdrawing thestraight edge 24o out from under the arm 5| on the take-up lever 49.When this occurs, the door is free to be pushed open from the inside.

It should be noted that if the door has been partially closed with thesafety catch arm 26 lying in the recess 51 of the keeper K, either ofthe above mentioned releasing methods will result in the withdrawal ofthe arm 26 from said recess 51, since the arm 26 is an integral part ofthe dogging lever and rotates whenever the dogging lever rotates. Theunlatched position is shown in Fig. 6. As previously mentioned lockingof the door is accomplished by rendering the unlatching meansinoperative. This may be accomplished in any one of four methods.

From the inside, the latch may be put in the locking position byswinging the inside door handle 62 upwardly, that is in clockwiserotation about its fulcrum 63, the strap 26 being moved tc the left.When said strap 20 has been moved far enough to the left to bring theinner right end of the slot Zia into contact with the pin I9, furthermovement of said strap will cause the pin I9 tc be moved to the left. Asviewed in Fig".

l the strap 20 is adapted to slide behind ,the

roll-back plate I9. Since the pin I9 is' a part of the lever I6, saidlever I6 will be revolved in a clockwise direction about its pivotwasher |611 until the projection I'I is again out of reach of theroll-back lever II, as illustrated in Figs. 9 and l0. When the insidedoor handle 62 is released, it will be returned to its neutral positionas shown in Fig. 1 by the action of the spring |04, at which time thepin I9 will be at the left end of the slot 20a of the strap 20 as shownln Figs. 9 and 10. The outside door handle on the dogging lever 2dspindlei2 1s thus rendered inoperative, thereby Ainside is by means of alocking button (not shown) secured to the upper end of the rod @5.

When the rod S5 is moved 'downwardlly by the manual operation of thepush button, the pin '23 at the lower end of the rod te rides in theslot 22 of the lever IS until it reaches the lower end ol the slot,whereupon further downward movement of the rod t5 will cause the leverIt to be rotated clockwise about its pivot washer Iba, thereby rotatingthe projection Il to a position out of reach of the end ci the roll-backlever II. In the pailance of the art this may be termed a disconnectposition for the latch control lever I6 as the outside handle rollbackis thereby rendered inoperative, the lever I6 being operativelydisconnected therefrom. The locking mechanism .is again in its lockedposition as illustrated in Figs. 9 and l0. Y

From the outside, locking may be accomplished vby revolving the spindleSil by means of a key.

When the spindle 3@ is rotated in a counterclockwise direction, thelocking lever 2S will also be rotated in a counterclockwise directionand the `arm 32 will be caused to Contact the bent up edge 2! of thelever It. rThe lever Iilwill thereupon be rotated in a clockwisedirection about the pivot Washer leo, thereby moving the projection Elto a point where the roll-back lever Il can no longer be moved intocontact with said projection il. rlhus, the door .cannot be unlatched bymerely turning the outside door handle, since in this position (Figs. 9and 1G) the outside door handle is inoperative for unlatching the door.

A fourth method of locking the door involves placing the mechanism inits locked position by pushmg down the push button attached to the upperend of the push rod t5, thus rotating the lever I clockwise about itspivot point so that the projection I1 will not be contacted by theroll-back lever II. However, it is to be noted that if the lockingmechanism is placed in its locked position while the door is open, themechanism will be moved to its unlocked position When thedoor is closed,due to the fact that the safety catch arm 2E, upon riding up theinclined surface 55 of the keeper K would causey the dogging leverv 24to be revolved clockwise. As the revolves clockwise from its latchedposition, the leading edge 56 (Fig. 9) of the projection 2da of saiddogging lever 2li moves against an edge lil' on the lever I6 to causesaid lever to rotate in a counterclockwise.direction back to4 itsnormalunlocked position. vAt the same time, the locking lever 2.3 is rotatedin a clockwise. direction out of its locked position'due to the factthat the bent up end 2l of the lever IS engages the arm 32 of saidlocking lever 29 to move said arm and locking lever into the positionillustrated in Fig. l. In this position, the end 34h of the spring Sliisin the notch 3l, thereby holding the locking lever 29 against vibration.The clogging lever 2G is also held against vibration by reason of thebiasing'action of the spring 21, the free end 21a of which actingagainst the lower edge 2417 of vsaid clogging lever urges the projection24a thereof against the projection 25 of the. lever I6. It' is seen,therefore, that if the door lock is put in a locked positioninadvertently while. the door is open it `will automatically be thrownout of locked position upon closingof the door. y y

However, if itl is desired to lock the .door from the, outside withoutthe use of a key, it is only necessary to put the mechanism in thelocked position by pushing down the push button on the top of the pushrod 65 as previously explained, and then rotating the roll-back lever iItoward the projection Il' on the lever I E into the position shown inFig. 10. With the outside door handle thus held in its turned downposition, upon the door being closed, the safety catch arm 26 will actto rotate the lever I6 counterclockwise about its pivot, thus tending toput it in its unlocked position. It will then be seen from Fig. l0 thatas the lever I6 is rotated counterclockwise by the action of theclogging lever 24 `due to the safety catch arm 26 being in contact withthe cam surface 55, the roll-back lever I I Will be positioned betweenthe projection I'I and the arm 25 of the lever It. Then, when the dooris closed, and the roll-back lever released by releasing the outsidedoor handle the spring I4 will rotate the lever II about its pivot pointat I2 in a counterclockwise direction. The roll-back lever II in thisrotation will contact the projection Il' of the lever l5 and once moreswingl the lever I6 clockwise about its pivot point and put it back intolocked position. Therefore, although the safety catch arm 26 as the dooris being closed will move the lever I6 into its unlocked position, theroll-back lever Ii will restore the lever I6 to its locked position.This method then of locking the door from the outside without the use ofa key by means of pushing the rod 65 down prior to closing the door andthen holding the rollback lever II in the turned down position as anduntil the door is closed, is the fourth method of locking the door.

From the foregoing description it will be evident that although the doormay be locked from the outside by the use of a key, it is much moreconvenient to use this fourth method of locking the door, namely, byputting the door in the locked position prior to closing it and thenholding the outside door handle in a turned-down position as the door isclosed. It is further evident that since this latter method of lockingthe door requires a deliberate, conscious effort on the part of theperson closing the door, the door will not be unnecessarily locked everytime it is closed.

It will, of course, be understood that various details of constructionmay be varied through a wide range without departing from the principlesof this invention and it is, therefore, not the purpose to limit thepatent granted hereon otherwise than necessitated by the scope of theappended claims.

I claim as my invention:

l In a latch mechanism for association with a door having an outsidedoor handle, a roll back plate, a dogging lever pivoted to said rollback plate and having` a safety latch bolt thereon cooperating with akeeper and pivoting said dogging lever into a release position uponengagement with the keeper upon door closing movement, a latch controllever pivoted to said roll back plate and having normal and oppositelydisposed unlatching and disconnect positions, said latch control leverhaving one engaging surface engageable with said clogging lever, tomove'said clogging lever to an unlatched position upon movement of saidklatch control lever in an unlatching direction, and having anothersurface slidably engaged byl said flogging lever to effect movement ofsaid latch control lever to a normal position from a disconnect positionupon door closing movement and engagement of said safety latch with thekeeper, control means connected with said latch control lever andoperable to move said latch control lever between normal and disconnectpositions, and a roll back level` pivotally mounted on said roll backplate and operated by the door handle, said roll back lever having oneengaging surface engageable with said latch control lever and movingsaid latch control lever into engagement with said dogging lever, torelease said dogging lever safety latch bolt and unlatch the door, andsaid roll back lever also having an opposite engaging surface`engageable with said latch control lever when positioned in adisconnect position by said control means when the door handle is helddown and said latch control lever is returned to a normal position bysaid dogging lever, for returning the latch control lever to adisconnect yposition upon release of the door handle 2 In a latchmechanism for association with a door having an outside door handle, aroll back plate having a ioll back lever pivotally mounted thereon andoperated by said handle, a dogging lever pivoted to said roll back plateand having a safety latch bolt thereon adapted to cooperate with akeeper and pivoting said dogging lever to a release position uponengagement of said safety latch bolt with a keeper upon door closingmovement, a latch control lever pivoted on said roll back plate andmovable to oppositely disposed unlatching and disconnect positions, saidcon- .trol lever having one arm engageable by said roll back lever,another arm engageable with said dogging lever, and an engaging surfacespaced from said last arm, means on said dogging lever cooperating withsaid engaging surface when said latch control lever is in a disconnectposition, and moving said latch control lever to a normal position uponthe door closing operation upon pivotal movement of said dogging levereffected by engagement of said safety latch bolt with a keeper, springmeans returning said roll back lever to a normal position from anunlatch- -ing position upon release of the door handle, con- L,

trol means operable to move said latch control lever out of reach ofsaid roll back lever to a disconnect position, and said roll back leverhaving an engaging surface opposite from its surface which moves saidlatch control lever to an unlatching position for returning said controllever to a disconnect position when initially positioned in such aposition by said control means and the door handle is held in anunlatched position and released after closing of the door 3. In a latchmechanism for association with a door having an outside door handle, aroll back plate and an associated rotor plate, a rotatable latch pivotedon said rotor plate, a dogging lever pivoted on said roll back plate andhaving a safety latch bolt cooperating with a keeper, means connectedwith said rotatable` latch bolt and engaged by said dogging lever forholding said latch bolt from rotation when said dogging lever is in alatched position, and releasing said rotatable ylatch bolt when saiddogging lever is in a retracted unlatched position, a latch controllever pivoted on said roll back plate and having an engaging surfaceengageable with said dogging lever, to move said dogging lever into anunlatched position and having another spaced surface engaged by saiddogging lever and pivoted by said dogging lever to return said latchcontrol lever to a normal position upon the door closing operation,control means connected with said -latch control lever and operable tomove said latch control lever between normal and disconnect positions, apivoted roll back lever operated by the door handle, a spring biasingsaid roll back lever to a normal position out of engagement with saidlatch control lever, said roll back lever having one engaging surfaceengageable with the latch control lever and moving said latch controllever and dogging lever to an unlatching position upon depression of thedoor handle, and having an opposite engaging surface engaging said latchcontrol lever and moving said latch control lever from a normal to adisconnect position when said latch control member has initially beenpositioned in such a position by said control means, and the door handleis held down during closing of the door and then released.

4. In a door latch mechanism for association with a door having anoutside door handle, a pivotally mounted spring-biased lever connectablewith and operable by said handle, a second lever mounted for pivotalmovement and having normal and disconnect positions, an arm on saidsecond lever engageable by the first lever in the normal position of thesecond lever for electing unlatching movement of the second lever, meansfor rotating the second lever to disconnect position, means engageablewith a keeper upon door closing movement and'having operative engagementwith said second lever and actuated by engagement with said keeper whenthe door handle is held in door unlatching position and the second leveris in disconnect position, for rotating the second lever out ofdisconnect position, said rst lever being responsive to its spring biasand having engagement with said second lever when the door is closed,with the door handle held in door latching position and the second leverin disconnect position, and the handle is then released, to rotate saidsecond lever back to disconnect position.

5. In a door latch mechanism for association with a door having anoutside door handle, a pivotally mounted spring-biased lever connectablewith and operable by said handle, a latch control lever pivotallymounted for movement in one direction from a normal position to adisconnect position and in the other direction for i unlatching movementand engageable by the rst lever in the normal position of the controllever for effecting unlatching movement of the control lever uponmovement of said spring-biased lever toward said' latch control lever, apivoted latch bolt, means holding said latch bolt in a latched position,means engaged by said latch control lever and engaging said holdingmeans for moving said holding means to release said latch bolt uponmovement of said control lever in an unlatching direction, said holdingmeans also having a portion engageable with a keeper and being moved toa release position by contact with said keeper during door closingmovement, said holding means also having operative engagement with saidlatch control lever, the latter releasing movement of said holding meansbeing eiective on said latch control lever for rotating it fromdisconnect to normal position.

6. In a door latch mechanism for association with a. door having anoutside door handle, a pivotally mounted spring-biased lever connectablewith and operable by said handle, a latch control lever pivotallymounted for movement in one direction from a normal position to adlsconnect position and in the other direction for .unlatching'movement' and 'engageable by the; rst .lever ina normal position of thecontrol lever upon pivotal movement of'said first lever toward saidlatch control lever in an unlatching direction, for effecting unlatchingmovement of 'said control lever, and a dogging lever having 4a portionengagea-ble with said control lever and retractable by said controlAlever upon pivotal movement of said control lever in an unlatchingdirection, and also having a portion engageable l'with a keeper andindependently retractable by contact with said keeper during doorclosing movement, the latter retracting movement being effective on saidcontrol lever for rotating it from disconnect to normal position.

- '7. In a door latchv mechanism forV association 'Witha door having anoutside door handle, a pivotally mounted spring-biased leverconnectable. with and operableby said handle,l a latch control levermounted for pivotal movement and having normal and disconnect positions,said latch control lever being engageable by the first lever in thenormal position of the latch control lever, upon pivotal movementofvsaid rst lever in an unlatching direction, for effecting unlatchingmovement of the latch control lever, controlv means connected with thelatch control lever for rotating the latch control lever to disfor'rotating the latch control lever out of disconnect position, said'firstlever being responsive to its spring bias to be effective after the dooris closed and the handle released to engageand rotate said latch.control lever back to disconnect position.

8.` In a door latch` mechanism for association with` a door having anoutside handle, a rotary latch bolt rotatable between latched and un.-latched position b-y Contact with a keeper during closing and openingmovements of the door, means including a dogging lever and meansinterposed betweensaid dogging leverY vand latch bolty for retainingsaid latch bolt in a latched position, a pivotally mounted spring-biasedlever connectable with and operable by said handle, a latch controllever pivotally mounted for movement in one direction from a normalposition to a disconnect position, and inthe other direction forunlatching movement and engageable by the rst lever when said controllever is in the normal position for eiTecting unlatching movement of thecontrol lever upon pivotal movement of said spring-biased lever in. anunlatching direction, said clogging lever having a projecting portionengageable with and being retractable by contact with a keeper duringdoor closing movement and having sliding engagement with said latchcontrol lever, the latter retracting movevvith a door having an outsidedoor handle, a

unlatchingmovement and engageable by Vsaid rfirst lever in the normalposition of the control lever for effecting unlatching movement of thecontrol lever, control means operatively connected with said controllever and independent of the outside handle forv rotating the latchcontrol lever to and from normal and disconnect positions, keeperactuated means engageable with a keeper and engaged by said latchcontrol lever and actuated by door closing movement for rotating saidlatch control lever out of disconnect position should it be in thatposition as the door is closing, said first lever being positioned byits door handle and having engagement with said latch control lever torotate said latch control lever to disconnect position solely inresponse to its spring bias whenever the control lever is set indisconnect position prior to door closing and the outside handle isrotated to unlatching positionl and held in this position during doorclosing and thereafter released.

10. In a door latch mechanism for association lvvith a door having anoutside door handle, a pivotally mounted spring-biased lever connectablewith and operable by said handle, a latch control lever pivotallymounted for movement inoneV direction from a normal position to adisconnect position and in the other direction vfor unlatching movement.and engageable by the iirst lever in the normal position of the controllever for effecting unlatching movement of' the control lever uponmovement of said first lever in an unlatching direction, meansindependent of the outside handle for rotating the latch control leverto and from normal and disconnect positions, keeper `actuated meansengageable with the keeper and engaging said control lever and actuatedby door closing movement for rotating said latch control lever out ofdisconnect position-should it be in that position as the door isclosing, said first lever having sliding engagement with the latchcontrol lever when the door handle is held in an unlatched position andbeing responsive to rotate said latch control lever to disconnectposition whenever the control lever is set in disconnect position priorto door closing and the outside handle is held rotated to unlatchingposition during door closing and thereafter released. y

l1. In a door latch mechanism for association pivotally mountedspring-biased lever connectable with and operable by said handle, alatch Icontrol lever pivotally mounted for movement in one directionfrom a normal position to a disconnect position and in the otherdirection for unlatcoing movement, and engageable by the iirst lever inthe normal position of the control lever for eiectingl unlatchingmovement of the control lever upon pivotal movement of' said first leverinto an unlatching position, means in'- -dependent of the outside doorhandle and operativelv connected with tbe latch control lever forrotating the latch control lever to and from normal and disconnectpositions, keeper actuated spring-biased safety latch means actuated bydoor closing movement and engageable with said latch control lever, forrotating said latch control lever out of disconnect position should itbe in that position as the door is closing, said lrst lever havingslidable engagement with said latch control lever when the door handleis held down during closing and the latch control lever is in disconnectposition and being responsive to its spring bias to be eiective torotate said latch control lever to disconnect position whenever thecontrol lever is set in disconnect position prior to door closing andthe outside door handle is held rotated to unlatching position duringdoor closing and thereafter released.

l2. In a door latch mechanism for association with a door having anoutside door handle, a pivotally mounted spring-biased lever connectablewith and operable by said handle, a second lever mounted for pivotalmovement and having normal and disconnect positions, an arm on saidsecond lever engageable by the first lever in the normal position of thesecond lever for effecting unlatching movement of the second lever uponmovement of the rst lever in an unlatching di- A rection, meansoperatively connected with said second lever for rotating the secondlever to disconnect position, door latching means engaged by the secondlever and movable thereby to unlatching position and also having asafety latching portion engageable with a keeper and actuated 'therebyby door closing movement when the second lever is in disconnectposition, for rotating the second lever out of disconnect position, saidrst lever having slidable engagement with said control lever when thedoor handle is held down and said control lever has been initiallypositioned in a disconnect position, and being responsive to its springbias to be effective after the door is closed and the handle released torotate said second lever back to disconnect position.

13. In a door latch mechanism for association with a door having anoutside door handle, a pivotally mounted spring-biased lever connectablewith and operable by said handle, a latch control lever having first,second and third arms and pivotally mounted for movement in onedirection from a normal position to a disconnect position and in theother direction for unlatching movement, said first arm being engageableby the rst lever in the normal position of the control lever uponpivotal movement thereof against its bias for effecting unlatchingmovement of the control lever, a keeper actuated clogging lever having asafety latch engageable with a keeper and retractable by contact with akeeper during doorclosing movement and also engaged by the second arm ofsaid control lever and retractable thereby upon pivotal movement thereofin an unlatching direction, said clogging lever when retracted by saidkeeper alone being engageable with said third arm of said control leverwhen in a disconnect position, for rotating the latter in a directionaway from disconnect position.

14. In a door latch mechanism for association with a door having anoutside door handle, a pivotally mounted spring-biased lever connectablewith and operable by said handle, a control lever mounted for pivotalmovement and having normal and disconnect positions, an arm on saidcontrol lever engageable by the first lever in the normal position ofsaid control lever for effecting unlatching movement of said controllever, a manually operable rod connected to said control lever forrotating said control lever to disconnect position, means keeperactuated by door closing movement for rotating said control lever out ofdisconnect position including a flogging lever having a projectingportion engageable With a keeper upon door closing movement, anotherprojecting portion engaged by said control lever to eiect movement ofsaid dogging lever to a released position upon unlatching movement ofsaid control lever, and a third portion engaging said control lever forrotating said control lever out of a disconnect position upon doorclosing movement when initially positioned in such a position by saidmanually operable rod, and said rst lever being responsive to its springbias and engageable with the control lever when the handle is held inits door unlatching position and said control lever is in disconnectposition. to be effective thereafter when the door is closed and thehandle released to rotate said control lever back to disconnectposition.

15. In a latch mechanism for association with a door having an outsidedoor handle, a springbiased pivoted roll-back lever connectable with andoperable by said handle, a spring-biased clogging lever having a safetylatch bolt thereon, a pivot latch control lever operatively engagingsaid dogging lever and engaged by said rollback lever when rotating inan unlatching direction for retracting said latch bolt when rotated bythe roll-back lever out of normal position, means operatively connectedwith said latch control lever and operable to pivot said latch controllever in an opposite direction from an unlatching direction to adisconnect position out of operative reach of said roll-back lever, saiddogging lever having slidable engagement with said latch control leverand actuating said latch control lever by engagement of the latch boltwith a keeper during door closing movement for restoring said latchcontrol lever from disconnect to normal position.

EDWARD D. DALL.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,840,062 Taylor Jan. 5, 19322,039,873 Andersen et al May 5, 1936 2,156,874 Schonitzer May 2, 19392,196,477 Simpson Apr. 9, 1940 2,246,782 Dall June 24. 1941 2,249,018Marple et al July 15, 1941 2,274,362 Devereaux Feb. 24, 1942 2,274,455Murphy Feb. 24, 1942

